Answer: b is the answer
Step-by-step explanation:
 
        
                    
             
        
        
        
Two correct answers:
9 + x
x + 9
Or you can say 
x - -9
or 
9 - -x
        
                    
             
        
        
        
List the factors of 24,30, and 24. Factors of 24: 1,2,3,4,6,8,12,24. Factors of 30: 1,2,3,5,6,10,15,30. Factors of 42: 1,2,3,6,7,14,21,42. The highest number that all of these numbers is 6. Therefore, the greatest common factor of GCF of 24,30, and 42 is 6.
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
First convert km to meters
143000 km = 143,000,000m = 1.43*10^8 m
Now convert 10 billion to scientific notation1  00
10 billion = 1 * 10^10
What this means is that 1 * 10^10 meters in outer space = 1 meter for the scale model.
Now show what the ratio is for 
1.43*10^8
========          Divide by the denominator
1 * 10^10
1.43 * 10^(8 - 10)
1.43 * 10 ^ - 2               meters
Answer: 0.0143m or B
 
        
             
        
        
        
could you show the picture up closer, so i can see?